func describe_image(img_url_chan <-chan string, img_chan chan<- feed.FeedMedia) {
for url := range img_url_chan {
mt, w, h, l, _ := curl.DescribeImage(url)
v := feed.FeedMedia{Width: w, Height: h, Length: l, Uri: url, Mime: mt}
img_chan <- v
}
}
func image_dimension(uri string) (feed.FeedImage, error) {
imgo := new_imagecache_operator()
v, err := imgo.find(uri)
if err == nil {
return v, err
}
v.Mime, v.Width, v.Height, _, err = curl.DescribeImage(uri)
return v, err
}